Tag

Depth-First Search Problems

DFS problems on trees, graphs, and grids — recursion, backtracking, post-order. (16 problems)

Easy · 4

Maximum Depth of Binary TreeeasySame TreeeasyInvert Binary TreeeasySubtree of Another Treeeasy

Medium · 10

Validate Binary Search TreemediumKth Smallest Element in a BSTmediumLowest Common Ancestor of a Binary Search TreemediumClone GraphmediumCourse SchedulemediumPacific Atlantic Water FlowmediumNumber of IslandsmediumGraph Valid TreemediumNumber of Connected Components in an Undirected GraphmediumDesign Add and Search Words Data Structuremedium

Hard · 2

Binary Tree Maximum Path SumhardSerialize and Deserialize Binary Treehard